All elements emit a distinct spectrum of light when in a glowing gas form. We have often seen fireworks and different colors in fires. This is caused by certain elements turning to gas and getting hot enough to glow a distinct color. The spectrum of each element is so unique that if a spectrum ca... (read more)
And I give you... The Theory of General (and Special) Relativity... by Albert Einstein...
Special Relativity The theory gives a unified account of the laws of mechanics and electromagnetism. Einstein rejected the Newtonian concepts of absolute space and time and the 19th century id... (read more)
